Random access response receiving and sending method, user equipment, base station and system

Abstract

Embodiments of the present invention disclose a random access response receiving and sending method, a user equipment, a base station, and a system. The method includes: after sending a dedicated random access preamble to a network side, on a physical downlink control channel, according to a pre-obtained dedicated identifier, detecting control signaling masked by using the dedicated identifier, where the dedicated identifier is a user equipment-specific temporary identifier configured by the network side for the user equipment, and the control signaling includes information about a physical downlink shared channel used to send a random access response and information required for decoding the random access response; and receiving the random access response on a corresponding physical downlink shared channel according to the control signaling.

Description

[0001]This application is a continuation of International Application No. PCT / CN2012 / 078565, filed on Jul. 12, 2012, which claims priority to Chinese Patent Application No. 201110194549.5, filed on Jul. 12, 2011, both of which are hereby incorporated by reference in their entireties.TECHNICAL FIELD[0002]Embodiments of the present invention relate to the field of communications technologies and, in particular embodiments, to a random access response receiving and sending method, a user equipment, a base station, and a system.BACKGROUND[0003]In a long term evolution (LTE) system, a user equipment (UE) may perform a random access procedure to obtain uplink resources required for uplink synchronization and / or communication. When the UE performs random access, the UE sends a random access preamble (RAP) to an eNB. Depending on whether the RAP is UE-specific, the random access procedure breaks down into a non-contention based random access procedure and a contention-based random access pr...

AI Technical Summary

Benefits of technology

The present invention provides a method for reducing the complexity for a user equipment to receive a random access response. This is achieved by using a dedicated identifier to mask control signaling used to indicate receiving of an RAR, which allows the UE to determine whether the current control signaling is sent by the network side to the UE, and receive the RAR only when the control signaling is detected correctly. This reduces the complexity for the UE and reduces the probability for the UE to incorrectly apply a timing advance carried in the RAR.

Problems solved by technology

Therefore, it can be seen that the complexity for a UE to receive a random access response is high in the prior art.

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